According to the offset calculator, the replica m5 rims will only stick out like 0.59 inches more than the 19" Double Spoke Style 401 - 19x8" ET36 225/40/R19 front / 19x8.5" ET47 255/35/R19 rear.

So I dont think there should be much of an issue here

The rear wheels should stick out an additional 22mm (.87 inch) on the 9.5in ET38 rear rims if comparing against the staggered setup with 8.5in ET47 stock. That seems pretty aggressive, anxious to see the photos.

The rear wheels should stick out an additional 22mm (.87 inch) on the 9.5in ET38 rear rims if comparing against the staggered setup with 8.5in ET47 stock. That seems pretty aggressive, anxious to see the photos.

It is inline with every recommendation I've got for new wheels for my car.